Try simply copying the command_line for notify-service-by-email and running it in a shell yourself. Or just do: # echo "Hello world" | /bin/mail -s "Test Email" root@localhost <div class="gmail_quote"> On Thu, Oct 1, 2009 at 8:28 PM, Scott Miller <<a href="mailto:srmiller@interbel.net">srmiller@interbel.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div><div></div><div class="h5"> Scott Miller wrote: >> I know this has been hit over and over, and I've read literally everything I >> could find, but to no avail. I have a newly install of Nagios 3.2.0 on a >> Fedora Core 8 with Postfix/Dovecot. I have a modified script (postfix mail >> queue monitor I shared a week or so ago). The only thing Nagios is doing on >> this box is looking at local services. When I change any threshold so I >> will go into alarm, it does, but no e-mails get sent out. >> >> I can see in my logs the following when something comes into alarm: >> >> [1254408621] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;SOFT;1;CRITICAL: Postfix mailq has 14 messages queued for a >> total of 12492 Kbytes. >> [1254408651] SERVICE ALERT: localhost;Current Load;OK;SOFT;2;OK - load >> average: 4.87, 2.73, 1.43 >> [1254408681] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;SOFT;2;CRITICAL: Postfix mailq has 16 messages queued for a >> total of 12497 Kbytes. >> [1254408741] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;SOFT;3;CRITICAL: Postfix mailq has 16 messages queued for a >> total of 12689 Kbytes. >> [1254408801] SERVICE ALERT: localhost;Postfix Mail >> Queue;CRITICAL;HARD;4;CRITICAL: Postfix mailq has 15 messages queued for a >> total of 12494 Kbytes. >> [1254408801] SERVICE NOTIFICATION: nagiosadmin2;localhost;Postfix Mail >> Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 15 >> messages queued for a total of 12494 Kbytes. >> [1254408801] SERVICE NOTIFICATION: nagiosadmin;localhost;Postfix Mail >> Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 15 >> messages queued for a total of 12494 Kbytes. >> >> Wondering if anyone could double check the pertinent parts of my config? >> >> Thanks in advance. >> >> Scott Miller > > What's in your mail log? Nagios is trying to send notifications using > the command you've defined, according to the logs. You haven't provided > the definition for that command (notify-service-by-email), but I assume > it's trying to send an email. > > If you're using anything like the example commands that come with > Nagios, it is probably using something like "/bin/mail" to send the > message, and your mail log would be a good place to look for why it's > not being delivered. </div></div>Sorry - didn't include that from the commands.cfg - Here's what I have. commands.cfg ============ # 'notify-host-by-email' command definition define command{ command_name notify-host-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$ } # 'notify-service-by-email' command definition define command{ command_name notify-service-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$" | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$ } This is the exact same way I have it on another machine running checks for multiple boxes and devices. The only difference, is this server is running Postfix, the other (working) is running Sendmail. In my logs: /var/log/maillog - grep for nagios - there's nothing /var/log/messages shows Oct 1 10:53:20 mail4 nagios: SERVICE NOTIFICATION: nagiosadmin2;localhost;Postfix Mail Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 13 messages queued for a total of 3326 Kbytes. Oct 1 10:53:20 mail4 nagios: SERVICE NOTIFICATION: nagiosadmin;localhost;Postfix Mail Queue;CRITICAL;notify-service-by-email;CRITICAL: Postfix mailq has 13 messages queued for a total of 3326 Kbytes. Looks like it's trying - maybe something in Postfix stoping it? I'll have to do a bit more digging and testing. Scott Miller <div><div></div><div class="h5"> ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! <a href="http://p.sf.net/sfu/devconf" target="_blank">http://p.sf.net/sfu/devconf</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </div></div></blockquote></div>